This is because of disagreement around how emissions that cross country borders must be allocated: do they belong to the nation of departure or country of origin? How are connecting flights accounted for? The tensions in reaching Global aviation and delivery discounts are discussed intimately in the Carbon Transient below. https://janitorial-services95617.blogolenta.com/26488072/how-much-you-need-to-expect-you-ll-pay-for-a-good-emissions-reporting